Diversity Portfolio - Classification (revised)----Cara (2)

Diversity Portfolio - Classification (revised)----Cara (2)...

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Fungi are classified under the domian domain Eukarya. To be categorized within this domain an organism must have cells that feature membrane-bound, complex structures such as a nucleus, enclosed within membranes. A fungal cell is more similar of the cells of animals than plants and includes a cell wall made of chitin. This kingdom is constantly evolving and is causing much debate within the scientific community. In 2007, after mycologists reviewed the phylogenetic analysis of DNA sequences they classified seven phyla under the kingdom Fungi (Raven et al ., 2009). There is currently another of the phyla, Zygomata, that is also being considered, however researchers wish to further investigate their evolutionary history before filing them within the kingdom. Microsporidia is the phyla used to classify unicellular parasites. Microsporidia are a very primitive form of eukaryotes. They include a plasma membrane, a coiled polar tube, layered polarplast, a posterior vacuole, an exospore constructed of proteins and chitin and a defined nuclei defined nuclei (Raven et al ., 2009). What separated them from other phyla is that they are in absence of structures such as mitochondria, stacked G g olgi apparatus, and peroxisumes peroxisomes (Raven et al ., 2009). The spores contain a polar tube that ejects the components of the spore into the host cell. This allows the parasite to set sets up and survive dependent on the host. Mircosporidia Microsporidia are usually round and oblong in shape. The ones affiliated with human infections are only 1-4 µm in size. The chitinous exospores that Microsporidia have are responsible for their high environmental resistance (Raven et al ., 2009). The next phyla, Blastocladiomycota, are
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This note was uploaded on 03/18/2012 for the course BIO 124 taught by Professor Dr.duran during the Winter '11 term at Drexel.

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Diversity Portfolio - Classification (revised)----Cara (2)...

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